Internal-combustion engine.



J. GUNTHER.

INTERNAL COMBUSTION ENGINE.

APPLICATlON HLED SEPT. 2i. 1911.

' 1,162,769. Patented Dec. 7, 1915.

Witnesss: 91ZV7UWT f W M flttamzy:

" {STATES PATENT OFFICE.

JAKOB (i-UNTHER, OF IBERGISGH-GLADBA CH, GERMANY.

INTERNAL-COMBUSTION ENGINE.

To all whom, itmay'concem:

Be it known that I, JAKOB GUNTHnR, a subject of the Emperor of Germany, residing at Ber'gisch-Gladbach, Germany, have invented certain.

' l ments in Internal-Combustion Engines, of

- which i the supply of the fuel has hitherto been ef fected through a special fuel conduit conthe said special fuel may be entirely dispensed with by.

which the following is a specification;

Ininternal "combustion engines wherein for the purpose of introducing and a'tomiz ing the liquidcha'rgense is made of a displacer piston moving in a displacer cylinder is connected to the working cylinder,

guiding the displacer piston in a prismatic (mostly hollow cylindrical) guide or cavity with suflicient play so that the intermediate space thus produced itself serves as an atomizing'passa'ge provided the combus tion' chamber. is so enlarged immediately behind that space that the fuel supplied thereto is not blown along the wall but is atomized into the space clear of the walls. In

this case during the movement of the dis- .85 i

- mtroduced at such a'point that. it is caused placerin its guide or cavity the fuel must .be

' to be atomized by the air current. It is the space. itself or dlrectly at its terminal 40 therefore introduced preferably either into In the combustion chamber. -By thesemeans the special fuel convey' g passage 1 which often gives rise to soot accumulations may be dispensed with'and the wear of the displacer in its guide is avoided. Several constructional forms of' the invention are shown in the accompanying drawmg in which L while Fig.

similar reference letters indicate similar parts.

Figure 1 is a sectional and the head of the the inven tior view of the cylinder cylinder according to the combustion chamber proper being shown in the head of thecylmder. Fig. 2 is a similar view showing another form of the invention, the combustion chamber being in the head of-the cylinder, 3 is a similar view showing a Specification of Letters Patent. App1ication iiled. September 21, 1911.

new and useful Improve- .lind'rical) displacement guide I 0 from the cold state Patented nee. a, 1915; Serial No.'60,577 I v if third form, the combustion chamber proper being situated between the head of the cylinder and the -p iston.

In Fig. 1 the main piston a is shown at the end of its compression'stroke. Its coneshaped inner end 6 forms with the likewise cone-shaped cylinder-wall an annur high pressure chamber 0. The bottom of the piston terminates in a generally prismatic (in the present instance cylindrical) displacing member 0! having an acutely rounded end play into the prismatic (in theexa'mple cyor cavity 6 so that a narrow annular space f is formed which separates the conical combustion chamber is from thehigh pressure chamber 0. In the rear of the annular space is a conical throttling passage '2) adapted to deflect the'air current from the walls of the combustion chamber. end of the throttling passage is the nozzle g serving for fuel.

The operation of this device is asfollows :During its movement in the direction of the arrow the working piston compresses a suitable charge of air. Before the end of the compression stroke the displacer (Z en- Termmating in the 4 the introduction of the liquid I adjacent and projecting with suflicient.

ters the cavity e thereby separating the'cylmder interior in the high pressure chamber combustion chamber is the connection being maintained solely by the throttling passage through which a short violent air current the former to the latter. Atthe same time fuel under pressure is introduced through the nozzle 9 by means of a fuel pump (not shown). The air which as shown in the drawing is forced toward the center of the combustion chamber in the form of a coni cal jet atomizes the fuel and after intimately mixing therewith ignites it. While in a the en ine may be started by means "of. a highly inflammable fuel such as benzin and driven thereby for a few min-, utes until the slowly combustible Working fuel is suppled to it. y

Fig. 2 shows a second constructional example wherein the air jet does not assume a conical shape as in form owing to the surface which guides the air current. In. this case the wall of the combustion chamber must be enlarged with'regard tolthe throt tling passage 7 as otherwise the atomized is caused to travel from Fig. 1 but a cylindrical cylindrical form of the oil be blown along the wall and consequently its combustion would be defective.

In Fig. 3- a third constructional form is illustrated wherein the high pressure chamber c. is located in-the rear end of the cylinder and the combustion chamber is is of an- 'nular shape. The projection of the piston tance from the inner surface of the head of the cylinder whereby the ring like combustion chamber is is formed. lhe air com-' pressed in the high pressure chamber 0 I flows "in a reverse direction through the ring like throttling passage f into this combustion chamber is. The fuel is introduced by means of one or a plurality of nozzles g terminating at the throttling passage 7. The manner in which also in this case the connecting part forming a portion of the wall must be tapered between the displacing and working'piston in order to keep the atomthrottling space, through which the air compressed in the cylinder is forced and means for introducin fuel into said ann lar throttling space so as to force a stream of air and fuel into the combustion chamber without spreading the fuel on its walls.

'2. In an internal combustion engine, in

" combination, a cylinder, a combustion chamber and a connecting passage between said cylinder and said combustlon chamber, said passage being arrangedco-axially-and concentrically with said cylinder, the entrance of saidpassage into said combustion chamber being of smaller diameter than the combustion chamber, apiston Within said cylin der, said piston having at its inner end a projection arranged co-axially and concentrically with said cylinder and said piston,

said projection being of smaller diameter than said passage and adapted to enterthe passage when the piston approaches and reaches itsinner position, thus forming with said passage an annular throttling space through which the air compressed in the cylinder'is forced freely into-the combus.

ized oil away from the wall is clearly tion chamber and means for introducing fuel 6 shown in the drawing. I

What I claim and desire to secure by Letters Patent is:' I j '1. In an internal combustion engine, the combination of a "cylinder, a combustion chamber and a passage between said'cylinder and said combustion chamber, said passage being of smaller diameter than thecombustion chamber, a piston within said cylinder, a projection on said piston, said projection'being adapted to enter the passage when the piston approaches to its inner position,

thus forming with said passage anf annular into said annular throttling space and the current of air forced through it, said fuel .flowing before the atomization thereof by In'test'unony whereof I affix my signature in presence of two witnesses.

I AKoB-GUNT'H R.

"Witnesses: I

OSCAR DEPNER, JOSEPH STODTEN. 

